The Drow Citadel

From publisher blurb: The portal the drow use to travel between their home plane on the Abyss and the realms they victimize has been secured. Now is the time for a counterstrike to take the conflict into drow territory. But the excursion is going to be dangerous and not for the weak! A Dungeons and Dragons® 5th edition adventure for 1-8 13th level characters. Episode 13 in the Drow Conspiracy.